Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b968ae369d0d01…

MALICIOUS

PDF

78.9 KB Created: 2021-01-21 22:49:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 053850f369c26c95e2c10ee21e349364 SHA-1: 0565ec2544107acefb2db20eb281c120cc145ba6 SHA-256: e8b968ae369d0d01f3010e454c4d0df29471bb106e11a3db062252a1cc215932
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links, specifically pointing to 'https://crophysi.ru/123?utm_term=workmate+425+review'. This URL is used to lure users into clicking on what appears to be a review, but likely leads to a phishing page or malware download. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://crophysi.ru/123?utm_term=workmate+425+review In PDF document text
    • https://cdn.sqhk.co/numavagoko/egdkHia/ritesusamitixorag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fccea4aad688.pdfIn PDF document text
    • http://zidujuwus.iblogger.org/comic_book_template_png.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/8090726.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/xipewefituvizolud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381302/normal_5fdaf8de42276.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/m4TNii7/93482419049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485448/normal_5fd0b8de4c9d8.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/0YvPTl2/female_superhero_alter_ego_names.pdfIn PDF document text
    • http://xikumidevulofo.iblogger.org/bollywood_movies_2019_free_online.pdfIn PDF document text
    • https://bomexufimewaw.weebly.com/uploads/1/3/4/5/134517434/9426480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369507/normal_5fd9e58a51484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418777/normal_5fd8193a30f11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xugonowelimije.epizy.com/jikusigaviputozufajuju.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/zitejogogoxibupanajakuzo.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/89955824657.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/conformational_isomers_in_organic_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/informal_letter_format_spm_english.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BB 5192 bytes
SHA-256: d59cbe7d549e6887c5e5d747dd14bba1bb8af01d08a4bad5e434efb7368e06cb
font_01_sfnt_off00010678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10678 12136 bytes
SHA-256: 7cc9fda475f1e581ef19ad96895d596260da9f852675b224ef31b076db751ae2

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